body {
  font-family: Arial, sans-serif;
  background: #f4f4f4;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

#chatbox {
  width: 100%;
  max-width: 600px;
  height: 80vh;
  background: #fff;
  display: flex;
  flex-direction: column;
  border: 1px solid #ccc;
  border-radius: 10px;
  overflow: hidden;
}

#chatlog {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
}

#input-area {
  display: flex;
  border-top: 1px solid #ccc;
}

#user-input {
  flex: 1;
  padding: 15px;
  border: none;
  font-size: 16px;
}

button {
  padding: 15px;
  border: none;
  background: #007bff;
  color: white;
  font-size: 16px;
  cursor: pointer;
}